How to use other vendor SFP in Cisco Switch??

--> If you use any other vendor SFP instead of Cisco in Cisco Catalyst switches, the port automatically goes to the err-disable state.

--> This is because by default Cisco Catalyst switches do not support another vendor SFPs in switch ports.

--> Each and every SFP contains the following number of details in its EEPROM,

i)Vendor Name

ii)Vendor ID

iii)Serial Number

iv)Security Code

v) CRC

--> When an SFP is placed into a switch's SFP port, the switch immediately checks whether the SFP is from Cisco or not.

--> If the inserted SFP is not from Cisco then the port goes into an err-disabled state.

--> In order to use another vendor SFP in a switch's SFP port, execute the following commands on the Cisco switch.

S1: To enable other Vendor SFP on switch's SFP port.

switch(config)# service unsupported-transceiver

S2: Configure the SFP port is not disabled when inserting another vendor SFP.

switch(config)# no errdisable detect cause gbic-invalid

S3: Reload the Switch 

switch(config)# reload

--> All these commands are going to work from IOS version 12.2(25)SE and above.

--> It is better not to use Cisco SFP if you are using in production network as there is no support from Cisco SFP for SFP related issues.

--> You can use other Vendor SFP, in case if you are using in the lab or want to save money.

Ref: Cisco.com

Md.Kareemoddin

CCIE # 54759